- Cabin Heating and cooling systems provide conditioned air for comfortable operations during various weather conditions
- Cabin heat is the system used to condition the air for the pilot and passenger's comfort during colder months and higher altitudes
- Cooling systems, while clearly designed to do the opposite of heating systems, are less prolific, but still exist
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Heat Exchanger
- Inlet air is bypassed through an exhaust shroud
- Air is ducted from exhaust shroud, now heated, into ventilation ducts inside of the cabin [Figure 1]
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Heat Exchanger
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Hartzell Combustion Heater Assembly
- Uses fuel from the aircraft fuel system to support a flame in a designated heater unit
- Air enters the combustion chamber by use of a fan or ram air where it is then burned inside a shroud [Figure 2]
- The resulting warm air from the shroud is routed into the cabin while the exhaust gas is vented overboard
- Heat is regulated with a thermostat
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Hartzell Combustion Heater Assembly
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- Coolant from the engine's cooling system is fed into the cabin and to a heat exchanger
- This heat exchanger blows air across a radiator, heating the air, and therefore the cabin
- This system is uncommon because it requires engines be liquid cooled when most are in fact air cooled
- This system is the same as that in your car
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- Exhaust pipes may burst allowing carbon monoxide to enter the cabin
- Heaters may have the same problem with the internal combustor
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- Temperature and intensity adjusted with push-pull labeled CABIN HT and CABIN AIR
- Air enters from wing and nose inlet vents
- Air heated with a heat exchanger with a shroud over exhaust pipes
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- Temperature and intensity adjusted with sliders
- Air enters from wing and nose inlet vents
- Air is heated with a heat exchanger with a shroud over exhaust pipes
- Additional air enters from the aft fuselage
- Carbon Monoxide Poisoning in a silent killer who's risk can be mitigated through a few simple steps
- Especially in winter months, refresh your knowledge on Carbon Monoxide and conduct an extra thorough preflight
- Remember, the heater system may have gone unused for months
- You can find more information about your aircraft in Chapter 7 of the Pilot Operating Handbook
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